Funnel shaped flowers in shades of blue are born in clusters on wiry stems in mid May/July. The narrow, erect leaves usually die off as flowering time. Ideal for mixed borders. Height 70cm(28in). The variety “Koningin Fabiola” has purple-blue flowers. They prefer well drained soil in a sheltered sunny spot where they can be left undisturbed, not requiring much attention except a winter mulch. Not recommended for planting in pots.